1979 Chart Toppers

I'm putting together a photo and music montage for our website for my upcoming 30 year high school reunion in 2009, so I thought - might as well put my research to use and make a quiz!

According to the Billboard Top 100 for 1979 there were only 20 artists who hit #1 (one actually counts twice with a duet). The quiz has questions about the songs and stats - enjoy!
(source Wikipedia crossreferenced with billboard - the stats are as they relate to The Billboard Hot 100 and not other charts)